Libertarianism refers to several ideologies/movements that advocate reducing or minimizing various forms of argued negative restrictions on individuals in order to achieve "liberty". In the United States, the term often refers to extreme forms of classical liberalism, but especially elsewhere the term may refer to anti-governmental forms of socialism.
Another division among libertarians is between minarchism, support for a minimal state, and anarchism, support for a stateless society. Specific terms for capitalist and socialist forms of anarchism are anarcho-capitalism and social anarchism. See also nationalism and anarchism.